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åºå žã»åèè³æ
- Rosetta Stone, 補åãšåŠç¿ã¡ãœããã®æŠèŠ, 2026幎ã¢ã¯ã»ã¹
- Duolingo, IRæ å ±ãšè£œåæ å ±, 2026幎ã¢ã¯ã»ã¹
- Ethnologue, 第27ç, 2024幎
- Council of Europe, ãšãŒãããèšèªå ±éåç §æ ïŒCEFRïŒ, 2026幎ã¢ã¯ã»ã¹
- U.S. Foreign Service Institute, èšèªé£æåºŠã©ã³ãã³ã°, 2026幎ã¢ã¯ã»ã¹
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