Most large super markets will have a polish food aisle . Also there are alot of polish shops in many larger towns . There is always the local deli they should stock various meats and treats that your mother in law will know .
There is a site: http://polishplate.com with list of restaurants and deli stores in USA. They have mostly polish food businesses but also businesses with food from other European countries.
Poland has had many kings. If you search "list of Polish monarchs" in wikipedia you will find a list of names and dates.
You can find a diabetic food list at http://diabetes.webmd.com/diabetic-food-list-best-worst-foods. It will help explain what foods to eat and what to stay away from.
There are many sources for information on Polish people. Wikipedia is very popular for an insight on Polish culture. Also there are popular searches for both Polish food and drinks available.
A wide selection of recipes and background information about Polish food is available at these websites: tastingpoland.com polishplate.com/ Here are a few other collections of Polish recipes: http://www.outernetweb.com/recipes/ http://polandpoland.com/polish_recipes.html http://www.polskafoods.com/polish-recipes
You can find list of food trucks in LA on the following websites; yelp, Find LA Food Trucks, Ranker, Food Trucks Map, and Los Angeles Travel on About website.
"This is good food" in Polish is "To jest dobre jedzenie".
"My favourite food ..." in Polish is "Moja ulubiona potrawa...".
"List."
A list of general food firms can be found on Wikipedia. The Wikipedia list includes all companies involved in food processing and production. Real Farmacy provides a printable list of food firms.
Finding a Polish restaurant in the United States can be hard, but there are many grocery stores in major cities that have international ingredients. You can probably find some recipes and buy the ingredients according to the recipe.
Seems there are several places that have Shellac Nail Polish. http://shellacnailpolishgel.com/ would be the site you need to check out to see what colors they have.