In this French Wikipedia article on the pronunciation of Occitan, semi-nasalization of the preceding vowel is mentioned. For example, from the table of consonants:
-n final
muet en général ([n] dans certains mots)
auvergnat, limousin : muet en général ([ⁿ] dans certains mots : semi-nasalisation de la voyelle précédente)
provençal, niçois, vivaro-alpin : [ⁿ] (semi-nasalisation de la voyelle précédente)
Translated:
-n final
silent in general ([n] in certain words)
auvergnat, limousin : silent in general ([ⁿ] in certain words : semi-nasalization of the preceding vowel)
provençal, niçois, vivaro-alpin : [ⁿ] (semi-nasalization of the preceding vowel)
What exactly is meant by semi-nasalization in this context, for example compared to the nasal vowels of French? And is [ⁿ] a standard IPA symbol for this concept? Looking it up on Wikipedia, I see the symbol is used for a "nasal release" which appears to be a different concept.