Please help us help you and fill where relevant:
Your LimeSurvey version: 6.1.3+230612
Own server or LimeSurvey hosting: Own server
Survey theme/template: Fruity
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We have added a couple of missing translations to local .mo files, as described in the manual: manual.limesurvey.org/Translating_LimeSurvey while we wait for the translations to appear in future LS updates – and it works beautifully for 7 of the 8 languages for which we need it, but not for Serbian (Latin script). It is in the right folder /locale/sr-Latn and has the right name sr-Latn.mo, but LS does not pick up the additional translations. Our procedure of preparing and providing the local .mo file is exactlly the same as for the other seven.

Any educated guesses at what I am overlooking?

Ahhhh never mind, the second after I made this post it then worked