Make translation links conditional. (#135)

Author: kattni

src/beeware_docs_tools/shared_content/en/contribute/index.md

@@ -32,10 +32,14 @@ Once a pull request is submitted, it needs to be reviewed before it can be merge
 
 Do you have a suggestion or idea for a new addition to one of the BeeWare tools? You can [propose a new feature](what/propose_feature.md) for consideration.
 
+{% if config.extra.translated %}
+
 ### [Translate content](what/translate.md)
 
 BeeWare maintains various documentation in multiple languages. If you know a language other than English, you can help with [translating content](what/translate.md).
 
+{% endif %}
+
 ### [Use the tools](what/use_tools.md)
 
 Do you have an idea for an app built with Toga? Do you have an existing app that could be packaged with Briefcase? You can [use the tools](what/use_tools.md) and provide feedback on your experience.
@@ -86,10 +90,14 @@ Once your changes are ready, you'll [submit a pull request](how/submit_pr.md) fo
 
 If you're comfortable, you can [provide a review of someone else's contribution](how/review_pr.md).
 
+{% if config.extra.translated %}
+
 ### [Translate content](how/translate.md)
 
 BeeWare uses Weblate for [translations](how/translate.md), which requires a few steps to get started.
 
+{% endif %}
+
 ### [Submit a new issue](how/new_issue.md)
 
 If you run into a new problem or bug, it's helpful to [submit an issue](how/new_issue.md).