297 & 298 are the same (sorry)
314 - “Enter” refers to the hardware keyboard key ENTER
357, 359, 374, 400 - a number of languages sticks to the English version to these
366 - Constructions - is a category name for word builder games - these include houses, barns, garages, walls, stairs, bridges, etc.
Word Builder words/terminology - they are actually separate from the *.po file and located at the end of /eduactiv8/i18n/custom/??.py
By the way, thanks for your work on this project.