| Business | Phone |
| Casa Italiana Language School 595 1/2 3rd St Nw, Washington 20001 | (202) 638-1348 |
| Berlitz Language Ctr 1050 Connecticut Ave Nw, Washington 20036 | (202) 331-1160 |
| Brazilian-American Cultural 4719 Wisconsin Ave Nw, Washington 20016 | (202) 362-8334 |
| Carlos Rosario Intrntnl Career 1100 Harvard St Nw, Washington 20009 | (202) 797-4700 |
| English House On Capitol Hill 114 3rd St Ne, Washington 20002 | (202) 352-7914 |
| Fairfield Language Tech 40 Massachusetts Ave Ne, Washington 20002 | (202) 842-1420 |
| Goethe Institute 810 7th St Nw, Washington 20001 | (202) 289-1200 |
| International Center-Language 727 15th St Nw # 400, Washington 20005 | (202) 639-8800 |
| International Language Inst 4301 Connecticut Ave Nw # 147, Washington 20008 | (202) 362-2505 |
| Lado Enterprises 2233 Wisconsin Ave Nw # B1, Washington 20007 | (202) 338-6983 |
| Language Learning Enterprises 1627 K St Nw # 610, Washington 20006 | (202) 775-0444 |
| Languageone 2305 Calvert St Nw, Washington 20008 | (202) 328-0099 |