On this page I will begin to compile online resources for the study of languages:
High UsageVocabulary
Arabic:
http://www.arabicpod101.com/arabic-word-lists/?page=1
http://www.linguanaut.com/english_arabic.htm
English:
http://en.wikipedia.org/wiki/Most_common_words_in_English
Spanish:
http://www.vistawide.com/spanish/top_100_spanish_words.htm
Alphabet:
http://www.omniglot.com/writing/hindi.htm
Word Origins and Etymologies:
http://en.wikipedia.org/wiki/List_of_English_words_of_Persian_origin
http://en.wikipedia.org/wiki/List_of_French_words_of_Arabic_origin
http://en.wikipedia.org/wiki/List_of_Arabic_loanwords_in_English
http://en.wikipedia.org/wiki/Foreign_language_influences_in_English
http://en.wiktionary.org/wiki/Appendix:List_of_Proto-Indo-European_roots
http://grammar.about.com/od/words/a/historytimeline.htm
About the language:
Swedish:
http://en.wikipedia.org/wiki/Swedish_language#History