When people Worship as ordained by Vedas, simultaneously they also worshipped in the local language,mother tongue. The Bhakti Bhava is more compatible with one's mother tongue. Hence many Saints practicing Bhakti Yoga,left behind their experiences of Godhood in Local languages. These remain at the regional level and are practiced even today. Thus we have Bengal ,Assam,Odisha following the Bhakti Bhava practices from Bengali and Oriya primarily in the East,North East of India. In the West Marathi Bhava is in place.
This temple was the abode of Sri Ramanujacharya,who espoused the Qualified Non Dualism, Visishta Advaitha,Visishtadvaida,. He had to flee from the Chola kingdom, Sri Rangam due to persecution from the king and some Vaishnavas and Shaivas. One may add here that there no mention of Shaivas and Vaishnavas in the Vedas, and as such, in my opinion,the difference between them, to say the least,is not what Vedas say.
Sita stayed in Ravana's custody for 10 months, what is the guarantee for her chastity? ( This noble thought was by Perarignar(?) Annadurai in his Book Kambarasam)
This is a function meant for women, married with Husband being alive. This has to be performed once a year for one Gothra and more than once in year should not be conducted. Tuesdays ans Saturdays are to be avoided. Fridays during the Waxing of the Moon is advisable. Wednesdays/Thursdays are also permissible. Ashtami,Navami Thithis are normally avoided. Panchami is preferable.
Basically Vaishnavas worship Vishnu to the exclusion of all other Deities, though Puranas insist that this is not correct. Even among the Vaishnavas, there are different Sampradayas. They are four in number traditionally. Sri Sampradaya which is the Sampradaya of Lakshmi Philosophy: Vishishtadvaita ("Qualified Monism/Non dualism"), espoused by Chidachida Visishtam Ramanujacharya