Improve iPhone App icons set for MosaLingua

MosaLingua

iPhone App to learn languages

MosaLingua iPhone App needs a new design !

We're looking to improve our existing icons for the MosaLingua iPhone Apps.
We have 5 different apps (to learn Spanish, English, English Business, French, and Italian), but the 5 icons should looks the same (with of course a different flag and a different lady for each language). It should be easily recognizable for our existing users.

We need that the icons are homogeneous (same family, only the language to learn is different). And something that really stands out in the AppStore would be amazing! (our current icons doesn't fit theses criterias...)

We provide (by email) the ladies in psd files, but you can modify them a little if you think it's necessary.
You should work in a good resolution (at least 1024x1024 px) in a photoshop or illustrator file (need to be provided). The psd should be organized in order to be easy to add a new language (just changing the lady and the flag).
And the icons should be scaled down until 57x57 px for the smallest version of the icon in PNG format.

Specific details about each icon size are below :

AppStore icon
- 512 x 512 pixel version of Application icon (more detailed than the small icons)
should have a place to write some title (like the icon 'Business English')

Application icon (without the title, and with less details if needed)
- iPhone icon : 57 x 57 pixels
- iPad : 72 x 72 pixels
- iPhone 4 icon : 114 x 114 pixels
No shine; no gloss
Does not use alpha transparency

So the final delivery should contains 5 sets of icons, and for each set, the 4 different size icons + the PSD in a good resolution.

Thanks in advance, looking forward to see what you come up with.

So the apps are for learning languages (with flash cards and more).
Some keywords representing the app that might help you: efficient learning and memorization, learning coach, good teacher...

Feel free to ask questions, I am here to help you !!