Language selection dropdown doesn't appear in GUI

[oanding-blrng]

Actual behavior

I want to change the language of the GUI, which I can start with ide gui. But the dropdown menu doesn't appear on the left side.

Reproduce

• Run ide gui within an ide project

Expected behavior

A dropdown menu should appear on the left side to select the language of the interface.
Further expected behaivor are mentioned in #1979.

IDEasy status

$ ide -p status
IDE_ROOT is set to ~/projects
IDE_HOME is set to ~/projects/project
Your version of IDEasy is 2026.07.001-07_07_06-SNAPSHOT.
You are using a SNAPSHOT version of IDEasy. For stability consider switching to a stable release via 'ide upgrade --mode=stable'
Your are using the latest snapshot version of IDEasy and no update is available.
Your operating system is windows(10.0)@x64 [Windows 11@amd64]
You are online.
Found bash executable at: C:/Program Files/Git/usr/bin/bash.***
Found git executable at: C:/Program Files/Git/mingw64/bin/git.***
Your settings are up-to-date.
Successfully completed ide (status)

Related/Dependent issues

#1936, #1979

Comments/Hints

If I run gui/src/main/java/com/devonfw/ide/gui/AppLauncher.java via IntelliJ, the language dropdown menu appears.