It not only had a design featuring Lord Ganesha but the language and the use of Sanskrit terms made it look distinct. That was the reason this card raised eyebrows.
Many people lauded the spirit while some didn't approve of the change. The marriage occurred sometime back in Mandsaur, which is situated in Western Madhya Pradesh on the border of Rajasthan.
Gulzar, a labourer, was married to Najma Bi. When he was asked by media persons, he said that he got his card printed in Hindi because most of his friends were Hindu and he wanted to send a message of communal harmony.
Gulzar's father Ismail said that he had no objection to his son's plan to invite his friends as per their culture and traditions. The terms like 'aamantran', 'chiranjivi' and 'mangal parinay' and other ceremonies were also in accordance with the local Hindu customs.
It is no rule but generally Indian Muslims [except in Kerala & some other states) get marriage invitation cards printed in Urdu. The upper middle class and the middle class Muslims often gets the cards printed in both English and Urdu.
Though I have seen some wedding cards in Hindi also [particularly in recent years in North India] anguage remains Urdu though the script is 'devnagari'.
Now see and read about a Hindu family's wedding invitation card in URDU at this LINK.