get customed translation using my own word files

[EthannyDing]

Description

Hi everyone, I have a problem regarding custom translation: i have a bilingual word file containing source words and its target translation word. when decoding a source text sentence, i want to use this file to help translate words in the sentence that also appear in my word file into its target translation.

In English-German machine translation, for example:

I want to translate a sentence:
"We are not happy with the decision of Commission."

My trained model would give me this, which is still great:
"Wir sind mit der Entscheidung der Commission nicht zufrieden."

but provided that my word file has src-tgt pair (Commission, Kommission), so i want the translation to be like this:
"Wir sind mit der Entscheidung der Kommission nicht zufrieden."

Does this problem have something to do with oov? Is it possible to train a model that will translate certain words from a sentence in my prefered fashion?
...

Environment information

OS: Ubuntu 14.0

$ pip freeze | grep tensor
mesh-tensorflow==0.0.5
tensor2tensor==1.13.4
tensorboard==1.14.0
tensorflow-estimator==1.14.0
tensorflow-gpu==1.14.0
tensorflow-hub==0.5.0
tensorflow-probability==0.7.0
tensorflow-serving-api-gpu==1.14.0

$ python -V
# python 3.7.3

For bugs: reproduction and error logs

# Steps to reproduce:
...

# Error logs:
...