[ADD] hr: Belgium payroll localization

Part-of: #12181
Signed-off-by: Yannick Tivisse (yti) <[email protected]>

Author: tivisse

content/applications/hr/payroll.rst

@@ -951,6 +951,7 @@ form.
    - :doc:`payroll/reporting`
    - :doc:`payroll/work_entry_analysis`
    - :doc:`payroll/salary_attachment`
+   - :doc:`payroll/payroll_localizations`
 
 .. toctree::
    :titlesonly:
@@ -962,3 +963,4 @@ form.
    payroll/reporting
    payroll/work_entry_analysis
    payroll/salary_attachment
+   payroll/payroll_localizations

content/applications/hr/payroll/payroll_localizations.rst

@@ -0,0 +1,53 @@
+:show-content:
+
+=====================
+Payroll localizations
+=====================
+
+Payroll localization refers to the process of adapting payroll systems, policies, and compliance
+measures to align with the specific labor laws, tax regulations, and social security requirements
+of a particular country or region. This ensures that employee salaries, benefits, deductions, and
+contributions are processed accurately and in full compliance with local legal and financial
+obligations. Localization also includes integrating country-specific payroll elements such as
+statutory benefits, holiday entitlements, termination rules, and reporting requirements, helping
+businesses avoid legal risks while ensuring employees receive their correct compensation.
+
+.. _payroll_localizations/countries-list:
+
+List of countries
+=================
+
+Payroll localization modules are available for the countries listed below.
+
+.. note::
+   New countries are frequently added to this list and Odoo keeps expanding and improving existing
+   localizations and the related documentation.
+
+- Australia
+- :doc:`Belgium <payroll_localizations/belgium>`
+- Bangladesh
+- Egypt
+- Hong-Kong
+- India
+- Indonesia
+- Jordan
+- Kenya
+- Lithuania
+- Luxembourg
+- Mexico
+- Morocco
+- Netherlands
+- Pakistan
+- Poland
+- Romania
+- Saudi Arabia
+- Slovakia
+- Switzerland
+- Türkiye
+- United Arab Emirates
+- United States
+
+.. toctree::
+   :titlesonly:
+
+   payroll_localizations/belgium