Being a non-native speaker, I was asked by my client (a native speaker) to use 'whether or not' instead of 'whether .... or not.' She specifically said that though both of them mean the same, it's about 'style.'
And no, there is no more or less sense in placing it at the end of the sentence but definitely we'll sound non-native.
Answer from Maulik V on Stack ExchangeVideos
How is the word 'applicable' different from other adjectives like it?
Some common synonyms of applicable are apposite, apropos, germane, material, pertinent, and relevant. While all these words mean "relating to or bearing upon the matter in hand," applicable suggests the fitness of bringing a general rule or principle to bear upon a particular case.
// the rule is not applicable in this case
When can 'pertinent' be used instead of 'applicable'?
The synonyms pertinent and applicable are sometimes interchangeable, but pertinent stresses a clear and decisive relevance.
// a pertinent observation
When is it sensible to use 'relevant' instead of 'applicable'?
The words relevant and applicable are synonyms, but do differ in nuance. Specifically, relevant implies a traceable, significant, logical connection.
// found material relevant to her case