Comment 102 for bug 1246272

The following worked for me, although trivial, I hope that it works for others also.

Try either: Shift + Super + Space then try typing to see if it has changed the layout.
                       Super + Space then try typing to see if it has changed the layout.

For me this was the problem and it is very easy to press these particular keyboard commands on Ubuntu 14.04 if you are using multiple programs.

Why should this work? Well if you go to Settings - Keyboard - Text Entry - *The above commands and what they do shown on the right* will make the above self-explanatory.
Alternatively after clicking *Text Entry* highlight the Keyboard layouts that you do not want (on the left hand side) and then click the minus sign below.

I hope this helps.