Hi Cindi!
A grade 1 indicator is not necessary because the foreign language is in grade 1, uncontracted braille as you mentioned. It should be clear to the reader that they are in uncontracted braille if the foreign words are distinguished either with a typeform indicator or the text specifically identifies the material as foreign, etc. It does not matter that the surrounding English words are in contracted braille. If there were superscript symbols after any English words, they would require the grade 1 symbol indicator. The use or non-use of the g1 symbol indicator is determined by the word to which it applies.
