Hi @Antti Mikkonen
The _SPTranslationLanguage field is a multi-valued field that stores all target languages of the page.
For example, if a page is translated into English and French, the value of this field will be "en-us,fr-fr".
Therefore, you cannot use the Eq operator to query this field, but should use the Contains operator.
Please try
<Contains> <FieldRef Name=‘_SPTranslationLanguage’ /> <Value Type=‘Choice’> en-us </Value> </Contains>
https://manueltgomes.com/microsoft/sharepoint/translate-your-list-column-names/
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Best Regards
Cheng Feng