Update contributing-translations.md

Using our combined super powers, add information from @mauritsvanrees and @erral to clarify the process.

Author: stevepiercy

docs/i18n-l10n/contributing-translations.md

@@ -82,22 +82,36 @@ The process of translating the Volto frontend is the following.
 ## Weblate for translations
 
 [Weblate](https://weblate.org/) is an open source project to help software developers translate their projects.
-
 Translators can work in a web interface, and not have to install third-party software or use git or GitHub.
-
 The Plone Foundation has obtained a "gratis Libre plan" account for Plone.
 Plone gets free hosting at the [Hosted](https://hosted.weblate.org/) platform that Weblate offers to open source projects.
 
-Translators can go to the [Plone project in Weblate](https://hosted.weblate.org/projects/plone/) to write translations.
 
-Translators will need to create an account there.
-Then your translations will be automatically contributed back to Plone's GitHub repository.
+### Weblate workflow
+
+Translators will need to create an account on Weblate with an email and password.
+Authentication with GitHub and other third-party accounts might not work.
+
+Translators can go to the [Plone project in Weblate](https://hosted.weblate.org/projects/plone/).
+
+You will see several components listed.
+The `volto` component is for the package `volto`, whose repository is at https://github.com/plone/volto.
 
 ```{note}
 At this moment Volto translations can't be contributed using Weblate.
 The Volto Team are working on this issue, and hope to fix it as soon as possible.
 ```
 
+All other components are for the package `plone.app.locales`, whose repository is at https://github.com/collective/plone.app.locales.
+
+See the Weblate documentation, [Translating using Weblate](https://docs.weblate.org/en/latest/user/translating.html), for how to use it to write translations.
+
+When you save a translation, then it is committed on a branch used only for translations in the respective GitHub repository.
+
+[Compare recent commits to the branch `translations-plone` on the package `plone.app.locales`](https://github.com/collective/plone.app.locales/compare/master...translations-plone).
+
+Maintainers will periodically create a pull request from the changes, and merge it.
+
 
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