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Rule "Capitalization of words derived from proper nouns"

This is one of many errors that LanguageTool can detect.

Description: Capitalization of words derived from proper nouns
Message: Possible alternative capitalization. Some verbs that are derived from proper nouns can have both an initial capital letter and an initial lower case letter. If there is a close association with the proper noun, use <suggestion>\1</suggestion>.
Category: Typography (ID: TYPOGRAPHY)
Link: https://languagetool.org/insights/post/spelling-capital-letters/
Incorrect sentences
that this rule can detect:
  • During the decline of the Ottoman Empire, these areas began to balkanize.
    Correction suggestion: Balkanize
  • ... as it balkanises the surrounding states.
    Correction suggestion: Balkanises
Correct sentences
for comparison:
  • During the decline of the Ottoman Empire, these areas began to Balkanize.
  • The missionaries tried to Christianise the natives.
ID: CAPITALIZATION_NNP_DERIVED [1]
Version: 6.8-SNAPSHOT (2025-10-24 22:33:07 +0200)