I'm looking for a word which converts the meaning of something such as a word, phrase or prayer which is said by rote as a form of dogma or ritual.
For example, a prayer or political phrase, which might be routinely spoken before a meeting or presentation.
Ideally, the word would convey on or more of the concepts that:
The content of the phrase, while dogmatic, is considered politically incorrect or taboo to challenge within the culture in which it is used.
Most people who repeat the phrase don't think about what it really means. They just do it because everyone else does it, or because they think it's "nice" or "the done thing."