So I tried my hands at writing a limerick...

And this is what I got:

Escoja
There once was a girl who couldn't choose
Which language she wanted to use.
Instead of a decision
She made it her mission
To use indecision as her muse.

Solution:
Había una niña que amaba
La lengua español y la tomaba
Mais Aujourd'hui elle veut
Parler le français surtout
Y mañana no sé que ella hablará.

This just in:
There once was a girl with some time
Which she spent on a bilingual rhyme
She forced it a bit
To make it all fit
And she hopes you forgive her that crime.