User blog comment:Amandelen/Translations that need to be checked/@comment-44719384-20191226224528/@comment-26239285-20191227063140

Most katakana words are just normal Japanese words that are conventionally written that way so it would be unhelpful (and arguably incorrect) to mark them differently.

Occasionally words that are not normally written in katakana do get written in katakana to highlight them in some way, for example, to suggest that some interpretation is required by the reader to understand what the lyrics are trying to say. In those cases there would be some point to italicizing them.

However, the convention on this site has been not to do so. Basically the purpose of the romaji lyrics are to indicate the pronunciation so people can follow along or sing the song, not so much to express the meaning of the lyrics.

As for the English translation, it's up to the translator's artistic licence as to how to translate and whether to italicize anything.

Hope this helps.