diff --git a/misc/gist/qt_and_tornado.py b/misc/gist/qt_and_tornado.py
index 4bc1a24359..afab507004 100644
--- a/misc/gist/qt_and_tornado.py
+++ b/misc/gist/qt_and_tornado.py
@@ -86,7 +86,7 @@ def do_gui_stuff(self, response):
 		self.setStyleSheet("background-color: orange;")
 
 
-# run the tornado loop in a seperate thread
+# run the tornado loop in a separate thread
 thread = threading.Thread(target=lambda : tornado.ioloop.IOLoop.current().start())
 thread.setDaemon(True)
 thread.start()
diff --git a/packages/vaex-core/vaex/__init__.py b/packages/vaex-core/vaex/__init__.py
index 5724d9b938..0e38fd49a8 100644
--- a/packages/vaex-core/vaex/__init__.py
+++ b/packages/vaex-core/vaex/__init__.py
@@ -457,15 +457,15 @@ def add(name, column):
     return from_dict(columns)
 
 
-def from_ascii(path, seperator=None, names=True, skip_lines=0, skip_after=0, **kwargs):
+def from_ascii(path, separator=None, names=True, skip_lines=0, skip_after=0, **kwargs):
     """
-    Create an in memory DataFrame from an ascii file (whitespace seperated by default).
+    Create an in memory DataFrame from an ascii file (whitespace separated by default).
 
     >>> ds = vx.from_ascii("table.asc")
-    >>> ds = vx.from_ascii("table.csv", seperator=",", names=["x", "y", "z"])
+    >>> ds = vx.from_ascii("table.csv", separator=",", names=["x", "y", "z"])
 
     :param path: file path
-    :param seperator: value seperator, by default whitespace, use "," for comma seperated values.
+    :param separator: value separator, by default whitespace, use "," for comma separated values.
     :param names: If True, the first line is used for the column names, otherwise provide a list of strings with names
     :param skip_lines: skip lines at the start of the file
     :param skip_after: skip lines at the end of the file
@@ -480,7 +480,7 @@ def from_ascii(path, seperator=None, names=True, skip_lines=0, skip_after=0, **k
         names = False
     else:
         namelist = None
-    data = rc.readcol(path, fsep=seperator, asdict=namelist is None, names=names, skipline=skip_lines, skipafter=skip_after, **kwargs)
+    data = rc.readcol(path, fsep=separator, asdict=namelist is None, names=names, skipline=skip_lines, skipafter=skip_after, **kwargs)
     if namelist:
         for name, array in zip(namelist, data.T):
             ds.add_column(name, array)
diff --git a/packages/vaex-core/vaex/docstrings.py b/packages/vaex-core/vaex/docstrings.py
index f786c0397c..279ddfbd6f 100644
--- a/packages/vaex-core/vaex/docstrings.py
+++ b/packages/vaex-core/vaex/docstrings.py
@@ -15,7 +15,7 @@ def docsubst(f):
 _doc_snippets["percentile_shape"] = """shape for the array where the cumulative histogram is calculated on, integer type"""
 _doc_snippets["selection"] = """Name of selection to use (or True for the 'default'), or all the data (when selection is None or False), or a list of selections"""
 _doc_snippets["selection1"] = """Name of selection to use (or True for the 'default'), or all the data (when selection is None or False)"""
-_doc_snippets["delay"] = """Do not return the result, but a proxy for asychronous calculations (currently only for internal use)"""
+_doc_snippets["delay"] = """Do not return the result, but a proxy for asynchronous calculations (currently only for internal use)"""
 _doc_snippets["progress"] = """True to display a progress bar, or a callable that takes one argument (a floating point value between 0 and 1) indicating the progress, calculations are cancelled when this callable returns False"""
 _doc_snippets["expression_limits"] = _doc_snippets["expression"]
 _doc_snippets["grid"] = """If grid is given, instead if compuation a statistic given by what, use this Nd-numpy array instead, this is often useful when a custom computation/statistic is calculated, but you still want to use the plotting machinery."""
diff --git a/packages/vaex-core/vaex/file/asyncio.py b/packages/vaex-core/vaex/file/asyncio.py
index 6928788a11..6044daae99 100644
--- a/packages/vaex-core/vaex/file/asyncio.py
+++ b/packages/vaex-core/vaex/file/asyncio.py
@@ -107,7 +107,7 @@ def chunks(self):
                 logger.debug('stop yielding, file closed')
                 break
             # if isinstance(item, BaseException):
-            #     logger.debug('stop yielding, exception occured')
+            #     logger.debug('stop yielding, exception occurred')
             #     raise item
             yield item
         if self.exception:
diff --git a/packages/vaex-core/vaex/legacy.py b/packages/vaex-core/vaex/legacy.py
index 36fb1ec42d..98c257c3da 100644
--- a/packages/vaex-core/vaex/legacy.py
+++ b/packages/vaex-core/vaex/legacy.py
@@ -292,8 +292,8 @@ def __init__(self, subspaces):
     def __len__(self):
         return len(self.subspaces)
 
-    def names(self, seperator=" "):
-        return [seperator.join(subspace.expressions) for subspace in self.subspaces]
+    def names(self, separator=" "):
+        return [separator.join(subspace.expressions) for subspace in self.subspaces]
 
     def expressions_list(self):
         return [subspace.expressions for subspace in self.subspaces]
@@ -550,7 +550,7 @@ def image_rgba(self, grid=None, size=256, limits=None, square=False, center=None
                 grid = self.bin_mean(weight, limits=limits, size=size, group_limits=group_limits, group_by=group_by)
             else:
                 grid = self.histogram(limits=limits, size=size, weight=weight, group_limits=group_limits, group_by=group_by)
-            if grid is None:  # cancel occured
+            if grid is None:  # cancel occurred
                 return
         import matplotlib.cm
         background_color = np.array(matplotlib.colors.colorConverter.to_rgb(background_color))
diff --git a/packages/vaex-core/vaex/settings.py b/packages/vaex-core/vaex/settings.py
index 069388c660..4d03d04c87 100644
--- a/packages/vaex-core/vaex/settings.py
+++ b/packages/vaex-core/vaex/settings.py
@@ -66,7 +66,7 @@ class Config:
 
 class TaskTracker(BaseSettings):
     """task tracking/protection when using vaex in a service"""
-    type: str = Field('', title="Comma seperated string of trackers to run while executing tasks", env="VAEX_TASK_TRACKER")
+    type: str = Field('', title="Comma separated string of trackers to run while executing tasks", env="VAEX_TASK_TRACKER")
     class Config:
         use_enum_values = True
         env_prefix = 'vaex_task_tracker_'
@@ -146,10 +146,10 @@ class Logging(BaseSettings):
     """
     setup : bool = Field(True, title='Setup logging for Vaex at import time.')
     rich : bool = Field(True, title='Use rich logger (colored fancy output).')
-    debug : str = Field('', title="Comma seperated list of loggers to set to the debug level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
-    info : str = Field('', title="Comma seperated list of loggers to set to the info level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
-    warning : str = Field('vaex', title="Comma seperated list of loggers to set to the warning level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
-    error : str = Field('', title="Comma seperated list of loggers to set to the error level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
+    debug : str = Field('', title="Comma separated list of loggers to set to the debug level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
+    info : str = Field('', title="Comma separated list of loggers to set to the info level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
+    warning : str = Field('vaex', title="Comma separated list of loggers to set to the warning level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
+    error : str = Field('', title="Comma separated list of loggers to set to the error level (e.g. 'vaex.settings,vaex.cache'), or a '1' to set the root logger ('vaex')")
     class Config(ConfigDefault):
         env_prefix = 'vaex_logging_'
 
diff --git a/packages/vaex-core/vaex/test/dataset.py b/packages/vaex-core/vaex/test/dataset.py
index 3d7146e240..59d525a121 100644
--- a/packages/vaex-core/vaex/test/dataset.py
+++ b/packages/vaex-core/vaex/test/dataset.py
@@ -395,13 +395,13 @@ def test_csv(self):
 		self.assertEqual(changes[1], ['index'], "mssing columns")
 
 	def test_ascii(self):
-		for seperator in " 	\t,":
+		for separator in " 	\t,":
 			for use_header in [True, False]:
-				#print(">>>", repr(seperator), use_header)
+				#print(">>>", repr(separator), use_header)
 				fn = tempfile.mktemp("asc")
 				with open(fn, "w") as f:
 					if use_header:
-						print(seperator.join(["x", "y"]), file=f)
+						print(separator.join(["x", "y"]), file=f)
 
 					# Scalar representation changed in numpy to to np.float64(0.0) for instance to
 					# avoid ambiguities
@@ -411,21 +411,21 @@ def test_ascii(self):
 						_repr = repr
 
 					for x, y, name in zip(self.x, self.y, self.dataset.data.name):
-						print(seperator.join(map(_repr, [x, y])), file=f)
+						print(separator.join(map(_repr, [x, y])), file=f)
 				#with open(fn) as f:
 				#	print(f.read())
-				sep = seperator
-				if seperator == " ":
+				sep = separator
+				if separator == " ":
 					sep = None
 				if use_header:
-					ds = vx.from_ascii(fn, seperator=sep)
+					ds = vx.from_ascii(fn, separator=sep)
 				else:
-					ds = vx.from_ascii(fn, seperator=seperator, names="x y".split())
+					ds = vx.from_ascii(fn, separator=separator, names="x y".split())
 
 				np.testing.assert_array_almost_equal(ds.data.x, self.x)
 				np.testing.assert_array_almost_equal(ds.data.y, self.y)
 				#np.testing.assert_array_equal(ds.data.names, self.dataset.data.name)
-				#if seperator == ",":
+				#if separator == ",":
 				#	df = pd.read_csv(fn)
 				#	ds = vx.from_pandas(df)
 				#	np.testing.assert_array_almost_equal(ds.data.x, self.x)
diff --git a/packages/vaex-hdf5/vaex/hdf5/dataset.py b/packages/vaex-hdf5/vaex/hdf5/dataset.py
index 950429aff0..4b5ab2c09b 100644
--- a/packages/vaex-hdf5/vaex/hdf5/dataset.py
+++ b/packages/vaex-hdf5/vaex/hdf5/dataset.py
@@ -99,7 +99,7 @@ def __setstate__(self, state):
         self._freeze()
 
     def write_meta(self):
-        """ucds, descriptions and units are written as attributes in the hdf5 file, instead of a seperate file as
+        """ucds, descriptions and units are written as attributes in the hdf5 file, instead of a separate file as
          the default :func:`Dataset.write_meta`.
          """
         with h5py.File(self.path, "r+") as h5file_output:
diff --git a/packages/vaex-ui/vaex/ui/completer.py b/packages/vaex-ui/vaex/ui/completer.py
index 40ade64c9c..1bd40fe25a 100644
--- a/packages/vaex-ui/vaex/ui/completer.py
+++ b/packages/vaex-ui/vaex/ui/completer.py
@@ -131,7 +131,7 @@ def case(word):
 class UCDCompleter(Completer):
     """
     UCDs have primary words (that come first), and secondary, that come after the second
-    UCD words are seperated by a ; char
+    UCD words are separated by a ; char
     """
 
     def __init__(self, line_edit):
diff --git a/packages/vaex-ui/vaex/ui/layers.py b/packages/vaex-ui/vaex/ui/layers.py
index 738da4850b..c00a1ca25a 100644
--- a/packages/vaex-ui/vaex/ui/layers.py
+++ b/packages/vaex-ui/vaex/ui/layers.py
@@ -1076,7 +1076,7 @@ def message(self, *args, **kwargs):
         pass
 
     def on_error(self, exception):
-        logger.exception("unhandled error occured: %r", exception)
+        logger.exception("unhandled error occurred: %r", exception)
         self.finished_tasks()
         traceback.print_exc()
         raise exception
diff --git a/packages/vaex-ui/vaex/ui/main.py b/packages/vaex-ui/vaex/ui/main.py
index 83716cf023..6bc45c6a36 100644
--- a/packages/vaex-ui/vaex/ui/main.py
+++ b/packages/vaex-ui/vaex/ui/main.py
@@ -1360,7 +1360,7 @@ def error(msg):
             index += 1
             self.dataset_selector.add(dataset)
 
-            # for this dataset, keep opening plots (seperated by -) or add layers (seperated by +)
+            # for this dataset, keep opening plots (separated by -) or add layers (separated by +)
             plot = plot if hold_plot else None
             options = {}
             # if we find --<task> we don't plot but do sth else
diff --git a/packages/vaex-ui/vaex/ui/plot_windows.py b/packages/vaex-ui/vaex/ui/plot_windows.py
index e60e447cee..fa3ed49272 100644
--- a/packages/vaex-ui/vaex/ui/plot_windows.py
+++ b/packages/vaex-ui/vaex/ui/plot_windows.py
@@ -1210,7 +1210,7 @@ def update_direct(self, layer=None):
         logger.debug("waiting for promises %r to finish", promises)
 
     def on_error_or_cancel(self, error):
-        logger.exception("error occured: %r", error, exc_info=error)
+        logger.exception("error occurred: %r", error, exc_info=error)
         traceback.print_exc()
         # raise exception
         raise error
diff --git a/packages/vaex-ui/vaex/ui/qt.py b/packages/vaex-ui/vaex/ui/qt.py
index a2803afb7e..d77a40b8c0 100644
--- a/packages/vaex-ui/vaex/ui/qt.py
+++ b/packages/vaex-ui/vaex/ui/qt.py
@@ -990,7 +990,7 @@ def qt_exception(parent, exctype, value, traceback):
     # , platform.architecture(), platform.dist(), platform.linux_distribution(),
 
     report = info + "\n" + trace
-    text = """An unexpected error occured, you may press ok and continue, but the program might be unstable.
+    text = """An unexpected error occurred, you may press ok and continue, but the program might be unstable.
 
 """ + report
 
diff --git a/packages/vaex-ui/vaex/ui/ranking.py b/packages/vaex-ui/vaex/ui/ranking.py
index 6c2d667b53..ffb5773f04 100644
--- a/packages/vaex-ui/vaex/ui/ranking.py
+++ b/packages/vaex-ui/vaex/ui/ranking.py
@@ -608,7 +608,7 @@ def onclick(dim=2):
         self.tab1d_button_layout.addWidget(self.button_actions)
 
         self.filter_line_edit = QtGui.QLineEdit(self)
-        self.filter_line_edit.setPlaceholderText("Enter space seperated search terms")
+        self.filter_line_edit.setPlaceholderText("Enter space separated search terms")
         self.filter_line_edit.textEdited.connect(functools.partial(self.onFilter, table=self.table1d))
 
         self.tab1dlayout.addWidget(self.filter_line_edit)
@@ -751,7 +751,7 @@ def func(index, previous, name=""):
             self.selectionModel.currentChanged.connect(functools.partial(func, name="currentChanged"))
 
             self.filter_Nd_line_edit = QtGui.QLineEdit(self)
-            self.filter_Nd_line_edit.setPlaceholderText("Enter space seperated search terms")
+            self.filter_Nd_line_edit.setPlaceholderText("Enter space separated search terms")
             self.filter_Nd_line_edit.textEdited.connect(functools.partial(self.onFilter, table=self.tableNd))
             self.tabNdlayout.addWidget(self.filter_Nd_line_edit)
 
diff --git a/tests/category_test.py b/tests/category_test.py
index 3f2effdd64..b6dd86eeef 100644
--- a/tests/category_test.py
+++ b/tests/category_test.py
@@ -73,7 +73,7 @@ def test_cat_missing_values(lazy):
     ds = ds0.ordinal_encode('colors', ['red', 'green', 'blue'], lazy=lazy)
     assert ds.count(binby=ds.colors, edges=True).tolist() == [1, 2, 1, 1, 0]
 
-    # if we want missing values and non-categorized values to be reported seperately
+    # if we want missing values and non-categorized values to be reported separately
     # the following is expected
     # ds = ds0.ordinal_encode('colors', ['red', 'green'])
     # assert ds.count(binby=ds.colors, edges=True).tolist() == [1, 0, 1, 2, 0, 1]
diff --git a/tests/compute_test.py b/tests/compute_test.py
index 5f70c17898..20fe42fcb7 100644
--- a/tests/compute_test.py
+++ b/tests/compute_test.py
@@ -55,7 +55,7 @@ def test_stay_same_type(x):
 
 def test_mix_string_and_numeric(x, s):
     df = vaex.from_arrays(x=x, s=s)
-    # TODO: Note that this is a seperate bug, it ignored the missing value
+    # TODO: Note that this is a separate bug, it ignored the missing value
     assert (df.s == 'a').tolist() == [True, False, False, False]
     assert (df.x == 1).tolist() == [False, True, False, None]
     assert ((df.s == 'a') | (df.x == 1)).tolist()[0] is True
diff --git a/tests/groupby_test.py b/tests/groupby_test.py
index cbe943a286..b363e0e830 100644
--- a/tests/groupby_test.py
+++ b/tests/groupby_test.py
@@ -739,7 +739,7 @@ def take(ar, indices):
 def test_row_limit_sparse():
     x = np.arange(100) % 10
     y = np.arange(100) % 11
-    # > 11 combinations, but not x and y seperately
+    # > 11 combinations, but not x and y separately
     # we should force a 'compress' phase to detect the row_limit
     df = vaex.from_arrays(x=x, y=y)
     with pytest.raises(vaex.RowLimitException, match='.* would have >= 11 unique combinations.*'):