Tamil is a widely spoken language around the world in many countries. Ubuntu has localization in Tamil. There are different keyboard layouts included in ubuntu for typing in Tamil language. From 1999, The goverment of Tamil Nadu, India has made Tamil 99 as the standard keyboard for Tamil computing. It is a modern keyboard layout designed scientifically to type faster in Tamil with lesser use of shift key combinations. https://en.wikipedia.org/wiki/Tamil_99 . Currently Ubuntu does not offer Tamil 99 keyboard layout by default. Kindly please add the Tamil 99 keyboard layout also in Ubuntu by default. So this would not necessitate the need to install third party keyboard softwares.
Recently Microsoft windows has added Tamil 99 keyboard layout in windows 10. (Though the Tamil 99 is implementation is partial and faulty in many key combinations)
Kindly enable this option. For key mappings of Tamil99 keyboard the following page can be referred to. https://github.com/balajijagadesh/jquery.ime/edit/master/rules/ta/ta-99.js
The key combinations are used for input in wikipedia and sister projects. The combinations described above are accurate (but again partial with reference to some rarely used special characters)
P.S. : For enabling this option how can I pitch in and do the work? How to begin the development process.