what is the difference between speech and spoken English?

The answers are as following:

Speech:- A talk, especially a formal one about a particular subject, given to a group of people, e.g. an election SPEECH.

Spoken English:- The form of language that you speak rather than write.

For your reference: LONGMAN DICTIONARY OF CONTEMPORARY ENGLISH

2006-11-04 14:52:39 補充：
Example for Spoken EnglsihSpoken English: 1. yeah; 2. nope, 3. San won't come to the P tonight; 4. How are you todie? (Australian speak in such way.)Writen English: 1. yes; 2. no; 3. Sandy will not come to the party tonight. 4. How are you today?

speech is talk to many people like a show (演講)
spoken English is just say out some English words (講話)

Speech means you talk Enlish in front of a lot of people.
Spoken English means you just talk English.

speech: 演講, 說話,言詞,言論
spoken english: 講話的英語