docs: translations happen on Weblate, with a badge in the README and how translators sign the CLA

CLA.md

@@ -88,6 +88,9 @@ We are not required to use or include any Contribution.
 Most contributors sign on GitHub: the CLA Assistant bot comments on your first pull request,
 and you sign there with one click. Your GitHub account then serves as your signature.
 
+Translators sign on Weblate: it shows this agreement before your first translation, and
+accepting it there serves as your signature.
+
 To sign by hand instead, fill in the following and send it to us on Matrix. The address is
 on the [Seb3thehacker GitHub profile](https://github.com/Seb3thehacker).
 

CONTRIBUTING.md

@@ -38,6 +38,19 @@ branch on `experimental`, and open your pull request against it.
 - Gearslip asks for no adb, root, or Shizuku. A feature must work with ordinary Android
   permissions and on-device consent dialogs.
 
+## Translating
+
+Translations happen on [Weblate](https://hosted.weblate.org/engage/gearslip/), not in pull
+requests. Pick your language, or start a new one, and translate in the browser. Weblate
+sends the finished work to this repository as a pull request.
+
+Keep the tone of the English: short, plain, and friendly. Leave placeholders such as `%1$s`
+and `%1$d` in place; Gearslip fills them with names and numbers. Untranslated strings show
+in English, so a partial translation is still useful.
+
+Before your first translation, Weblate asks you to accept the
+[Contributor License Agreement](CLA.md). That counts as signing it.
+
 ## Writing
 
 Text that users read, such as screens, release notes, and docs, follows Strunk's

README.md

@@ -9,6 +9,8 @@ An Android Auto alternative built for everyone.
 
 [<img src="https://raw.githubusercontent.com/ImranR98/Obtainium/main/assets/graphics/badge_obtainium.png" alt="Get it on Obtainium" height="80">](https://apps.obtainium.imranr.dev/redirect?r=obtainium://add/https://github.com/twinksoftware/gearslip)
 
+[![Translation status](https://hosted.weblate.org/widget/gearslip/app/svg-badge.svg)](https://hosted.weblate.org/engage/gearslip/)
+
 Questions, ideas?
 [Join the discussion on Matrix](https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org).
 
@@ -153,6 +155,9 @@ Bug reports from real cars help most, and pull requests are welcome.
 [CONTRIBUTING.md](CONTRIBUTING.md) explains what to put in a report, which branch to work
 on, and the one-time agreement you sign before your first pull request merges.
 
+To help translate Gearslip into your language, join
+[Gearslip on Weblate](https://hosted.weblate.org/engage/gearslip/). No coding needed.
+
 ## Building
 
 ```