The FOSS server fossies.org - also supporting "Matomo" - offers a feature "Source code misspelling reports". Such reports are normally only generated on request, but as Fossies administrator I have just created for testing purposes such a codespell based analysis for the new Matomo release 3.13.4:
Although after a first review some obviously wrong matches ("False Positives" = FPs) are already filtered out (ignored) please inform me if you find more of them so that I can force a new improved check if applicable.
If appropriate, additional reports for the current release or also master versions (these in a special "test" folder) could be willingly created.
OT: As Fossies admin I am somewhat annoyed that a single file ("How to install Matomo.html") is located outside of the main subdirectory "matomo", as Linux user that the filename contains spaces and as a general user that the file seems superfluous since already existing within the directory "matomo/misc".