I hold a licence for Q++Studio, the only software that allows for the automated typesetting of diaries and calendars.
Q++Studio provides me with two language tools:
Translation into 33 languages of the texts typically found in diaries: days of the week, months, etc. This includes languages that use alphabets other than Latin, such as Russian, Arabic and Chinese. And Q++Studio has clients on all continents, so you can be certain that its translations are reliable.
The option of creating a database which includes all the necessary translations in any other language. Q++Studio uses databases to insert each day's texts automatically. Therefore, as long as translations included in said databases are correct, the certainty of not making mistakes will be guaranteed.
In addition, I can also handle the translation of texts into any language not supported by Q++Studio.