13. Moreover, the fact that a language is not introduced into full liturgical use does not mean that it is thereby altogether excluded from the Liturgy. It may be used, at least occasionally, in the Prayer of the Faithful, in the sung texts, in the invitations or instructions given to the people, or in parts of the homily, especially if the language is proper to some of Christ’s faithful who are in attendance. Nevertheless, it is always possible to use either the Latin language or another language that is widely used in that country, even if perhaps it may not be the language of all – or even of a majority – of the Christian faithful taking part, provided that discord among the faithful be avoided.
Important, that last part. Potentially, this is very sensitive territory.