Guru Gobind Singh Ji once heard a Sikh mispronounce a line from Gurbani. Upon hearing this Guru Sahib taught the Sikh that one should recite Gurbani with the correct pronunciations. If one makes a mistake when reciting Gurbani then they should re-read it correctly. Often when we make mistakes while reciting we change the meaning of Gurbani without knowing. One must have the true desire to read Gurbani in order to understand the essence of Gurbani.  Often we think that reading the transliterations or translations is enough to understand Gurbani. This is a very big misunderstanding, translations and transliterations do not do justice to the great depth of Gurbani. While they may be good stepping stones, one should move on from these and learn Gurmukhi.