TYPO3 Core

Situation: a record with multible relations to other record. every field are excluded from translating (l10n_mode => exclude) except for the label (title)

Expected:
A copy of the Record with modified LanguageUid and l10n_parent pointed to the original Record.
No other Records or relations are touched.

Translation Overlay mode in Frontend mapped the content from the default language record into the translated record.

Actual:
A copy of the Record with modified LanguageUid and l10n_parent pointed to the original Record.
Every related record are also translated. (creates database junk)

Theory:
the l10n_mode is currently ignored for relation fields