You and I are both human beings, and we share an earthly experience. If it were not possible for me to understand you and your language then we would be true aliens sharing the same breathing space. But this is not, I believe, the case. Your tactic, I believe, is to avoid cross-contamination of faith by placing obstacles in the path of honest discussion.
To say that the Christian understanding of righteousness is different from the Jewish understanding is fair enough. There is a difference, and this difference was fully understood by the Jewish apostle Paul. Paul's credentials as a Jew are laid bare by the man himself.
'I say then, Hath God cast away his people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.' [Romans 11:1]
'Though I might also have confidence in the flesh. If any other man thinks that he hath whereof he might trust in the flesh, I more:
Circumcised on the eighth day, of the stock of Israel, of the tribe of Benjamin, an Hebrew of the Hebrews; as touching the law, a Pharisee; concerning zeal, persecuting the church; touching the righteousness that is in the law, blameless.
But what things were gain to me I counted loss for Christ.' [Philippians 3:4-7]
Did Paul not understand the nuance of language? Of course he did. He knew exactly what the Hebrew Scriptures taught.
What Paul recognised was that there was a difference between righteousness under the law, and the righteousness of God. Paul claimed to be blameless under the law, in a way that modern Jews, without the Temple, can only imagine. But Paul had more to say about righteousness,
'Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,
And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:' [Philippians 3:8,9]