Original sentence: This sound is very common in British place names because it occurs in the word Llan, a church, and Welsh placenames are therefore very often mispronounced by English speakers, especially those from outside the British Isles
Edited sentence: This sound is very common in British place names because it occurs in the word Llan, a church, and Welsh placenames are therefore very often sadly mispronounced by English speakers, especially those from outside the British Isles