Improving polylang compatibility with other plugins

Hello,

I am trying to get Polylang to work with CPT-onomies and in the process I have stumbled upon something that I need some help/clarification with.

Some introductory info follows:

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My wordpress setup is as follows:

I have polylang installed to display 2 different languages.

I have 2 custom post types , say Brands and Products.

Both are set as translateable and I have the polylang translations working fine.

Now, for reasons that are not important to the problem, I need to also use the Brand custom post type as a taxonomy that can be assigned to a Product (yes, there are other ways of doing this semantic connection but as I said , it needs to be done like that for other reasons).

To this end, I have installed CPT-Onomies which allows you to do exactly that (register a custom post type as a taxonomy).

Obviously that plugin is unaware of the the existence of Polylang so when I’m editing a product it displays the UN-filtered list of taxonomy terms (in this case custom posts of the Brand type).

When that plugin obtains the list of terms to display I could use a conditional like :
if (pll_is_translated_taxonomy($taxonomy)) {

to add the ‘lang’ argument to obtain a filtered list.

However that obviously would break that plugin in any other wordpress install without polylang.

Digging a little deeper I found out that the parse_query filter of Polylang is called at that point but the query vars of that get_posts call remain unchanged (without a ‘lang’ argument being added)
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So the question is this.

If a get_posts call is made requesting posts of a custom type that IS declared as traslateable in Polylang but the query_vars do NOT have a ‘lang’ arg set (because the calling plugin is unaware of this), shouldn’t the parse_query filter add this argument? Wouldn’t that improve general compatibility? Obviously that would need a different way of obtaining all the translations of a certain post type etc. (for example when displaying the list of posts in the admin) but surely there is a better way of bypassing translation filtering.

Any thoughts?

http://wordpress.org/extend/plugins/polylang/