Provide an interpreter. Have speakers available in the different languages whenever possible. Provide an interpreter to encourage discussion with parents. Have handouts available in different languages. This takes a lot of planning but is worth the effort.
Parents really appreciate it.
Make sure there are no errors in the translations. Plan family workshops where parents and children learn together. Plan activities for child care and include books, coloring books, bingo, etc. Don't forget prizes or certificates. Videos are a hit.