Over the past few years, I've repeatedly made polite requests to SwiftKey for the addition of a few extra characters that are used for writing Sanskrit. The workaround is very tedious, performing copy/paste often hundreds of times per day when I write, because of the lack of these characters on the keyboard. The necessary characters to add are shown below. What do I need to do to get help with this?
ṅ Ṅ Ñ ṭ Ṭ ḍ Ḍ ṇ Ṇ ṣ Ṣ ā Ā ī Ī ū Ū ṛ Ṛ ṝ Ṝ ḷ Ḷ ḹ Ḹ ṁ Ṁ ḥ Ḥ