Solutions Proficient in a foreign language has 6 entries with similar clues

• 4-letter words
• como"... Agua Para Chocolate" [hit 1992 foreign-language film)
• ableProficient
• 5-letter words
• ablerMore proficient
• adeptBecome thoroughly proficient in
• 8-letter words
• practiceBecome proficient at
• 13-letter words
• lingua-francaA language used as a common language between speakers whose native languages are different