Mayor de Blasio is sending teams of translators hired by City Hall to help Russian and Haitian immigrants cast their ballots Tuesday — despite red flags raised by an Elections commissioner since the mayor is on the ballot, The Post has learned.

The mayor, who is up for reelection, will have his own Office of Immigrant Affairs station 40 Russian- and Haitian Creole-language interpreters outside 20 polling places in southern Brooklyn on Election Day, at a total cost to taxpayers of around $8,000 in funding from the City Council.

During a meeting of the Board of Elections last month, acting Immigrant Affairs Commissioner Bitta Mostofi referred to the effort as a “one-time project” that will rely on workers supplied by an unidentified “temp agency.”

But Board of Elections President Frederick Umane said the plan “causes a problem for us because…it’s a City Council- and mayor-sponsored program that may look to affect that election.”

“It sort of raises perhaps an issue of the smell test or whatever, you know, that this is the year they want to do it,” he said, according to a recording of the Oct. 10 meeting.

“It’s a one-shot deal that coincides with the election of those same people who are proponents of this.”

Umane, Manhattan’s Republican elections commissioner, also worried that the plan “would impose a requirement on us” going forward, and could expose the BOE “to litigation from other people.”

De Blasio’s Republican challenger, Nicole Malliotakis, cried foul when told about the Democratic incumbent’s plan.

“Any help with translation should be done by the Board of Elections — which is why they have both Republican and Democratic co-workers,” Malliotakis said.

“It is inappropriate for an agency that is under the control of the mayor to be assisting individuals when they’re casting their ballot.”

“Everything is controlled by the mayor — that makes it a concern,” the Staten Island assemblywoman added.

Sources familiar with the plan said NYPD cops have been told not to interfere with the translators if they’re within the 100-foot radius around polling places where electioneering is prohibited by state law.

One source also said the plan raised the specter of voter fraud, and noted recent courtroom testimony by crooked real-estate developer Jona Rechnitz, who said political contributions got him personal access to de Blasio.

“After what happened last week, I don’t know if he’s that stupid or that arrogant to allow this,” the source said of the voter-translation plan.

The MOIA said that election officials already supplied translators for Spanish-, Chinese-, Korean- and other Asian Indian-language speakers where needed, under terms of the federal Voting Rights Act, and that Russian and Haitian Creole speakers comprised the “next largest” populations.

“We respect the right of every registered voter to be enfranchised,” spokeswoman Rosemary Boeglin said.

“This is one of several efforts that were requested by the Administration and City Council that BOE declined to implement, such as posting notices at closed poll sites.”

The BOE and de Blasio’s campaign declined to comment.

Additional reporting by Rich Calder