Aceproof detects the following errors and irregularities:

1. Inconsistencies: Places where identical sources were translated differently, or differing sources were translated identically.

2. Space-related errors: Consecutive spaces, inconsistent leading, trailing, or tag-adjacent spaces.

3. Punctuation-related errors: consecutive punctuation marks, spaces before punctuation, differing tags and segment-final punctuation.

4. Untranslated segments or pieces of segments,

5. Inconsistent initial capitalization,

6. Segments where the source and target differ significantly in length.