Have different NLP models based on chosen languages at runtime

[Aran30]

In case one would like to develop a bot capable of using multiple languages, there should be a language model for each language.
This way, if a language switch is to occur, the bot would also switch the language model accordingly.

This change would require functions to:

• Set the different languages at design time.
• Jump between languages during run time.
• Define different training examples and add a language to categorize the training examples.