Words aren't distinguished by tone, it is solely used for Grammar.
For mono-syllabic words, the -lein suffix is added in case you need a tone on the second syllable. If a third syllable is needed, add the -chen suffix too.
Verbs can also add the ein- prefix.
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Tonal German
कथेतर साहित्यGerman with Tones A quick disclaimer, I have no idea how tonal languages work
