The bert tag description says:
BERT and BERT-RPC are an attempt to specify a flexible binary serialization and RPC protocol that are compatible with the philosophies of dynamic languages such as Ruby, Python, PERL, JavaScript, Erlang, Lua, etc.
However, there are questions with this tag that seem to refer to the BERT - Basic Excel R Toolkit.
Should a new tag be created to accomodate the BERT Excel toolkit?
Yes, we definitely need two different tags, this is what I suggest
We create bert-toolkit, the BERT - Basic Excel R Toolkit.
We retag (close if off-topic) the toolkit questions.
The tag names are not perfect since in bert-toolkit the t stands for toolkit and in bert-rpc, the serialization format is only called BERT.
However I think there is no need for a tag specific for the serialization format and since the web site is http://bert-rpc.org this tag should be clear.
As for the bert-toolkit, let's ignore that t = toolkit, we mostly need people to select correct tag and search engines to find questions.
Result
User starting to type bert can select between bert-toolkit or bert-rpc.
Searching for bert will work with both, if user includes toolkit or rpc they will be directed to correct tag.
Come 2019, there is a new BERT Big-&-Extending-Repository-of-Transformers, which is related to this paper: https://arxiv.org/abs/1810.04805. It is a new language model.
There were 6 news questions in the tag all related to that tag. I renamed the tag in its entirety to bert-language-model.
So for now, we can consider this small uprising from the bert-walkers to be quashed.
Update on June 30th 2019:
Apparently some users went ahead and recreated the bert tag, and there are 25 questions tagged with it now. I retagged them all to the bert-language-model tag again.
Update on Aug 2nd 2019
My monthly check on the health of this tag revealed 5 new questions in the bert tag, which I retagged.
bert] into [bert-language-model], after retagging the (very few) non-nlp posts. This affected ~250 posts.
[ERNIE]tag...