Watson, 22, is charged with an "act contrary to good sportsmanship", as well as tackling Alex Goode in the air.
The first offence alleges he used "offensive, inappropriate and unprofessional" language after being sent off.
Watson featured in every Six Nations game for England this year as they won their first Grand Slam since 2003.
England tour Australia in June and Watson's place may be in doubt if he is found guilty of a dangerous tackle at a hearing on Tuesday, with the charge carrying a top end sanction of 10 weeks.
If found guilty, the minimum punishment is a two-week suspension.
Former London Irish player Watson could face penalties ranging from a reprimand, to a financial penalty, or a suspension if he is found guilty of the unsportsmanlike conduct charge.
Bath - beaten finalists last year - are ninth in the Premiership table with four games left to play this season.

People for the Ethical Treatment of Animals (Peta) wants the mascot to be replaced with a modern animal-friendly version.
The group has suggested a fish with the slogan Skegness - A Happy Plaice.
The mayor of Skegness said all suggestions were welcome but said he did not think there would be much support for Jolly to be axed.
The original Jolly Fisherman poster was commissioned by the Great Northern Railway to encourage visitors to take the train on their seaside breaks to Skegness.
The poster featured the slogan "Skegness is so bracing".
It was commissioned in 1908 for 12 guineas and has became synonymous with the Lincolnshire resort.
However, Dawn Carr, of Peta, said Jolly "evokes images of cruelty to animals".
"Fish being tricked into impaling themselves in the mouth, animals being pulled out of the ocean in giant nets where they are so crushed together the pressure pushes their stomachs out through their mouths and their eyes pop out."
"This is what the Jolly Fisherman represents," she said.
She said Peta's suggestion would give the resort an opportunity to rebrand itself as a progressive holiday destination.
"One where the mutilation and killing of sea animals is not being celebrated."
Skegness's mayor, Carl Macey, said the Jolly Fisherman was loved by adults and children alike.
He said: "Animal cruelty is something we don't want to be portrayed for, but I don't feel Jolly has ever come across in that manner.
"He is just accepted as happy and friendly and he does such a wonderful job for Skegness.
"It [Peta's suggestion] will go before council, but if it isn't broken we won't try and fix it."

The pair worked together at Watford and Northern Irishman Rodgers, 43, is the frontrunner for the Celtic job after two rounds of talks this week.
Celtic's largest shareholder Dermot Desmond said on Wednesday "in excess of six" candidates had been interviewed for the manager's position.
"There's no doubt about his qualities," said Warburton, 53, of Rodgers.
The Englishman was a coach with the Hornets during Rodgers' time as manager, with the latter subsequently having a spell in charge of Reading and then leading Swansea to promotion to the Premier League.
A move to Liverpool followed and Rodgers left Anfield in October after over three years in charge.
Warburton is preparing his Rangers side to face Hibernian in Saturday's Scottish Cup final.
The Englishman has already won the Championship and Challenge Cup in his first season in Glasgow.
And, after overcoming eventual Premiership champions Celtic in this season's Scottish Cup semi-final, Warburton's Rangers will face their Old Firm rivals in next season's top flight.

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The news of Annan Athletic's 4-1 fourth-round win over Hamilton Academical was far-reaching.
Omar, the son of refugees from Iraqi Kurdistan, was featured in the local press there.
"There's a big following there now, my uncle tells me," said the Glasgow University student.
"A lot of them, when they are looking out for scores, will look out for Annan Athletic now."
Annan's dream ended in the fifth round though, when they lost 4-1 to Morton.
For more information about how to get into football, take a look at the Get Inspired page on the sport.
Bath full-back Anthony Watson faces two Rugby Football Union charges after being sent off in the loss to Saracens.
[NEXT_CONCEPT]
An animal rights group is calling for the Skegness mascot, the Jolly Fisherman, to be replaced with a fish.
[NEXT_CONCEPT]
Rangers manager Mark Warburton believes Brendan Rodgers would be a "great choice" as Celtic's new manager.
[NEXT_CONCEPT]
Goal hero Rabin Omar made headlines when his club from the fourth tier of Scottish football dumped a Premiership side out of the Scottish Cup.