Pseudocode is not a programming language. It is a planning tool which looks like a programming language. The point of pseudocode is to allow a programmer to plan out (on paper) how a program will work without worrying about any specific syntax. The pseudocode could then be used as a plan for writing the actual program in any target language.
There is not a global pseudocode standard
The most important pointS to remember when writing pseudocode is not to use any language specific terms and that THE pseudocode you write makes sense.
However Cambridge does include in the syllabus the pseudocode terms that it would like you to use. You should try to stick to these when answering questions in an exam.
Revising Pseudocode
You can use the Quizlet set below to help with revising the CAIE specific pseudocode.