When Submitting Code To Publisher Must It All Be In The Same Language? I might have the opportunity to submit a paper to an academic journal and also submit my code for it as well. However, I tend to do my projects across different coding languages because sometimes i'll be working in one language and then find a particular package available in another - so I work back and forth between languages. 

I am just concerned that if I submit my paper and I am asked to supply code for replication purposes that it would be frowned upon that all the code is not central to one language. For example - I might do some of the project in Python and some in Matlab, and I would have to submit code for both languages. 

Has anybody had experience with this?
The reason to ask for code is that the journal cares about reproducibility and quality of the science. The language of the code does not matter much, and normally it does not matter if two languages are used. A journal also accepts papers that use both fluorescence and mass spectroscopy, and there is no reason why they would refuse the use of two programming languages.

Of course it may be possible that your particular journal has additional requirements for code. If that is the case they probably say so in the author guidelines (you can check their website). If not, you can submit your code and they will let you know if something needs to be changed.