After re-installing Adobe Pro due to problems with crashing, when adding text to a PDF document, typing a colon or number would result in the digits moving to the left of all the text and appearing in a non-English font. On googling the issue, I found a thread referring to the fact that the Language default in Preferences may be set to "English with Arabic support" with all options for "Editing in Middle Eastern Languages" toggled on. This was the case for me and I reset the Application Language Preference to Same as operating system and toggled the Middle Eastern Languages options to off. Adobe needs to ensure the default language matches the user's region.