Indo- European family of language
Old English was characterized by strong and weak verbs; a dual number for pronouns (for example, a form for we two as well as for we); two different declensions of adjectives; four declensions of nouns; and grammatical distinctions of gender. In Old English phonology, the distinctive features are -- the breaking of front vowels most in the cases, before /x/, /w/, /r/ and consonant, /l/; shortening of Vowels when falling immediately before either three consonances or the combination of two consonants and two additional syllables in the word.
The Old English period is a multi-lingual period – a period with several languages being used simultaneously. Their contact inevitably produced a rich system of communication. Although rich in word-building possibilities, Old English was sparse in vocabulary. To begin with, English interacted with Celtic, the language of the conquered people, itself another branches of Indo European tree. The Celtic influence is not strong and is most evident in place – names: