Where does “Lernersprache” come from?

Lernersprache (German) comes from German Lerner, from German -er, from Old High German -āri, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Lernersprache (German): interlanguage

Definitions

  1. interlanguage

Ancestry of “Lernersprache”, step by step

Lernersprache traces back through two separate lines of ancestry.

via German Lerner

StepLanguageWordMeaning
1GermanLernerlearner (usually of a language) male or of unspecified gender
2German-erForms agent nouns etc. from verbs, suffixed to...
3Old High German-āriused to form agent nouns
4Proto-West Germanic-ārī-er
5Proto-Germanic-ārijaz-er
6Latin-āriuser
7Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via German sprāche

StepLanguageWordMeaning
1Germansprāchelanguage body of words, and set of methods of combining them
2Middle High Germansprāche
3Old High Germansprāhha
4Proto-West Germanic*sprākuspeech, language
Every word from Proto-Italic *-āzios