Dear Richard and All, As the (Bengali) character sequences say," " produce the same rendering result as of the sequnces say, "" and then such character sequences might have an impact on RFC-3491 & RFC-3492 for name input & name comparison and thereby in Punycode in IDNA. For examples, a charcater sequence বাদ্লা (Baadla). বাদ্লা (U+09CD not followed by U+200C) 09AC: ব BENGALI LETTER BA 09BE: া BENGALI VOWEL SIGN AA 09A6: দ BENGALI LETTER DA 09CD: ্ BENGALI SIGN VIRAMA 09B2: ল BENGALI LETTER LA 09BE: া BENGALI VOWEL SIGN AA 0020: SPACE বাদ্‌লা (U+09CD followed by U+200C to get no Conjunct) 09AC: ব BENGALI LETTER BA 09BE: া BENGALI VOWEL SIGN AA 09A6: দ BENGALI LETTER DA 09CD: ্ BENGALI SIGN VIRAMA 200C: ‌ ZERO WIDTH NON-JOINER 09B2: ল BENGALI LETTER LA 09BE: া BENGALI VOWEL SIGN AA Thanks & Regards Goutam Kumar Saha