doc/l10n: improve the doc

Author: sylvestre

.vscode/cspell.dictionaries/workspace.wordlist.txt

@@ -347,4 +347,5 @@ uutils
 getcwd
 
 # * other
+weblate
 algs

README.md

@@ -15,6 +15,7 @@
 
 [![CodeCov](https://codecov.io/gh/uutils/coreutils/branch/master/graph/badge.svg)](https://codecov.io/gh/uutils/coreutils)
 ![MSRV](https://img.shields.io/badge/MSRV-1.85.0-brightgreen)
+[![Weblate](https://hosted.weblate.org/widget/rust-coreutils/svg-badge.svg)](https://hosted.weblate.org/projects/rust-coreutils/)
 
 </div>
 
@@ -59,6 +60,7 @@ uutils has both user and developer documentation available:
 Both can also be generated locally, the instructions for that can be found in
 the [coreutils docs](https://github.com/uutils/uutils.github.io) repository.
 
+Use [weblate/rust-coreutils](https://hosted.weblate.org/projects/rust-coreutils/) to translate the Rust coreutils into your language.
 
 <!-- ANCHOR: build (this mark is needed for mdbook) -->
 

docs/src/l10n.md

@@ -10,6 +10,8 @@ This guide explains how localization (L10n) is implemented in the **Rust-based c
 
 - **Main repository**: Contains English (`en-US.ftl`) locale files embedded in binaries
 - **Translation repository**: [uutils/coreutils-l10n](https://github.com/uutils/coreutils-l10n) contains all other language translations
+- **Online Translation**: [weblate/rust-coreutils](https://hosted.weblate.org/projects/rust-coreutils/) to translate the strings.
+
 
 ---
 
@@ -30,6 +32,9 @@ Examples:
 
 These files follow Fluent syntax and contain localized message patterns.
 
+The French translation is the only locale with English to be part of the tree. The goal is to be able to run tests with
+a different locale to verify that they work.
+
 ---
 
 ## ⚙️ Initialization