N10. The condition of praying for the Supreme Pontiff’s intentions is fully satisfied by reciting one “Our Father” and one “Hail Mary”; nevertheless the individual faithful are free to recite any other prayer according to their own piety and devotion toward the Supreme Pontiff
N22. An indulgence attached to a prayer can be acquired by reciting the prayer in any language, provided that the translation is approved by the competent ecclesiastical authority.
N23. To gain an indulgence it is sufficient to recite the prayer alternately with a companion or to follow it mentally while it is being recited by another.
N26. Both the deaf and the mute can gain indulgences attached to public prayers if, together with the other faithful praying in the same place, they devoutly raise their mind and affections to God; regarding private prayers it is sufficient for them to recite the prayers mentally or express them with signs, or simply to read them without pronouncing the words.
15. MENTAL PRAYER
A partial indulgence is granted to the faithful who for their personal edification devoutly spend time in mental prayer.