with DE, it works (Translates to German)
with JA, it works Translates to Japonés)
with US, it doesn't work (returns Spanish)
with EN, it doesn't work (returns Spanish)
with en, it doesn't work (returns Spanish)
The fix for this issue-> uimapi-20.4.8-T1.zip is attached to this KB article.
With the above fix, using "US" works as it translates alarms from Spanish to English as expected.