article: Proto-Indo-European language
links: BC Consonant List of Indo-European languages Grimm's law Old English Close-mid back rounded vowel Spanish Indo-European languages Kurgan hypothesis Pontic Mountains Approximant consonant Voice (phonetics) Close-mid front unrounded vowel Caspian Sea Fricative consonant Eastern Europe Nasal consonant Sanskrit Colon (punctuation) Aspiration Close-mid vowel Front vowel Voicelessness Stop consonant English Vowel length Inflection German language Vowel Writing