German forms of standard terms that are considered improper, incorrect or commonly misused.

• Category:German eye dialect: German nonstandard spellings, which however do not change pronunciation, deliberately used by an author to indicate that the speaker uses a nonstandard or dialectal speech.
• Category:German hypercorrections: German forms of other terms by misapplications of grammatical or orthographical rules.
• Category:German misconstructions: Terms wrongly built due to a misunderstanding of their parts.
• Category:German misspellings: Common accidental misspellings of German terms and some terms which are deliberate misspellings.
• Category:German umlautless spellings: German terms that are the result of the original terms'umlauts being substituted.

• German nonstandard terms
• Nonstandard forms by language

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