f17r

[-JKP-]

I'd say that it would be methodologically risky to assume beforehand that marginalia are related to the main content. It is not certain and just introduces bias. First of all, we need to discern at least a part of a cohesive phrase in any language, and only then should we look at whether it corresponds to the  main content or not.

In the case of You are not allowed to view links. Register or Login to view. we have at least "pox leber" and "so rim/nim gas mich" which both make sense, although can bear not a single meaning. In the case of You are not allowed to view links. Register or Login to view. we don't have any phrase yet which would be compliant with orthography and grammar of any language.

From a couple of months ago: You are not allowed to view links. Register or Login to view.

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I'm fluent in English and Spanish, but it wouldn't occur to me to mix the two languages when making notes - unless the prompt for the note was in the second language causing me to think in that language.
Still, the important thing is to find a coherent sentence in any language. 
But if it's Italian we potentially have three notes in three languages - MH German, Spanish and Italian.

Scribes in the 1400s were constantly tossing in Latin terms mixed with their own language. Even in the 1700s, when books were printed in mass quantity for a broader audience, Latin and Greek phrases were intermixed with the language in which the book was written (French, English, German, Italian, etc.) without a footnote to translate it. The fact that there were no footnotes indicates that they assumed the reader could read the Latin and Greek phrases without explanation.