I guess that the best way to improve your spoken language is to practise it. You would ask me how to practise English. I would say try to speak English as much as possible.
Try to find and make friends who speak English. For example, you may find a friend of yours who is interested in English. Do not miss such a chance and never hesitate to ask him or her to speak in English whenever you are together. Besides, Nowadays one of speaking tips you can do that ( making friends) easily by using some Internet programs such as,
Paltalk
yahoo messenger
MSN messenger
Using such programs will allow you to meet a lot of English speakers who will undoubtedly help you improve your spoken English. Just be prepared with a microphone and headphone.
Doing what I told you will guarantee you a very good improvement in speaking English
Take care
Vigor