Localization working only in Standalone, Changes default language in Viewport

Localization is unintentionally changing UE default language to pt-BR when in viewport. This results in having to Stop, repeat steps, and select en to reset language to en. It does not change language in Standalone.

This was tested and reported in 4.24.3 (CL-11590370). This was reproduced in 4.25.3 (CL-13942748) and 4.26 Preview 3 (CL-14488950)

1. Launch Engine
2. Open Localization Project
3. In Viewport click play
4. Select language button in viewport
5. Default Language for UE changes entirely
6. Stop Playmode
7. Reset default language by repeating steps

Outcome: By selecting either English or Portuguese, the Engines default language changes to respected language.

Expected Outcome: The default language should not change, it should only change in Viewport and Standalone