Question: What is the french term for the level of the mass rapid transit where riders can purchase their tickets?

Context paragraphs:
Facilities on the Mass Rapid Transit (Singapore): Stations on the Mass Rapid Transit, the rapid transit system in Singapore, are either above-ground or underground, or just below ground level (in the case of the North-South Line side of Bishan MRT Station).  Most stations have a concourse level, where fares are paid based on the length of the ride, and a platform level, where passengers get on and off trains.  Usually, the concourse is closer to ground level than the platform level is.  Most stations have island platforms. Amenities include retail spaces, General Ticketing Machines, at least one Passenger Service Centres, payphones, toilets, and LED and plasma displays that show the time until the next train.

Kaohsiung Mass Rapid Transit: Kaohsiung Mass Rapid Transit or MRT, formally Kaohsiung Rapid Transit System (), is a rapid transit system covering the metropolitan area of Kaohsiung, Taiwan.  Construction of the KMRT started in October 2001.  The Red Line and the Orange Line opened on March 9 and September 14, 2008, respectively.  KMRT is operated by the Kaohsiung Rapid Transit Corporation (KRTC; ) under the BOT contract the company signed with the Kaohsiung City Government.

Mass Rapid Transit (Malaysia): Mass Rapid Transit, better known with its acronym "MRT") is a planned 3-line mass rapid transit system in the Greater Kuala Lumpur (part of Klang Valley region) conurbation in Malaysia.  It envisages a "wheel and spoke" concept comprising two northwest-southeast radial lines and one circle line looping around Kuala Lumpur.

Mass Rapid Transit Corporation (Malaysia): Mass Rapid Transit Corporation Sdn Bhd (MRT Corp) is fully owned by the Minister of Finance (Incorporated) and is a corporate body established under the Ministry of Finance (Incorporation) Act 1957.  It was set up to be the developer and asset owner of the Mass Rapid Transit project in Kuala Lumpur, the capital of Malaysia, under the government's move to restructure the city's public transport system.  The company was established on September 2011 and took over the ownership of the Klang Valley Mass Rapid Transit Project in October 2011 from Prasarana Malaysia Berhad.

Taman Universiti station: The Taman Universiti MRT station is a future provisional Mass Rapid Transit (MRT) station.  When constructed, it would serve the nearby Taman Universiti Indah in Seri Kembangan, Selangor, Malaysia and serve as one of the stations on Klang Valley Mass Rapid Transit (KVMRT) Sungai Buloh-Serdang-Putrajaya Line.  The station will be built on the side of Jalan Putra Permai, nearby the National Hydraulic Research Institute of Malaysia building.

MRT Purple Line: The MRT Purple line (Thai: รถไฟฟ้ามหานคร สายสีม่วง ), officially the MRT Chalong Ratchadham line (Thai: รถไฟฟ้ามหานคร สายฉลองรัชธรรม ), is a rapid transit line of Bangkok's Metropolitan Rapid Transit system for the Mass Rapid Transit Authority of Thailand (MRTA) in the Bangkok Metropolitan Region and Nonthaburi Province.  It opened for service on 6 August 2016 and is the second MRT line operated by BEM (formerly BMCL) and the city's fifth rapid transit line, following the Sukhumvit Line, Silom Line, MRT Blue Line, and Airport Rail Link.

Taipei Metro: Taipei Metro, Taipei Mass Rapid Transit or MRT, or the Taipei Rapid Transit System , is a rapid transit system serving metropolitan Taipei, Taiwan.  The system is built by the Department of Rapid Transit Systems, Taipei City Government (DORTS-Taipei) and Department of Rapid Transit Systems, New Taipei City Government (DRTS-New Taipei) and operated by the Taipei Rapid Transit Corporation (TRTC).  It consists of 108 stations (117 stations if transfer stations are double-counted) and 5 main routes and 2 branch lines, operating on 131.1 km of revenue track.  The system carried an average of around 2.10 million passengers per day in March 2016.

Orange Line (Kaohsiung MRT): The Orange Line is an East-West line of the Kaohsiung Mass Rapid Transit in Kaohsiung, Taiwan.  It opened on September 14, 2008, the day of Mid-Autumn Festival, for a week-long free trial service.  After the free trial service, the Kaohsiung Mass Rapid Transit offered a month-long single one-way promotional NT$15 service on both the Red and the Orange line, with regular ticket price applies after this.

Kolkata Light Rail Transit: Kolkata Light Rail Transit (KLRT) is a mass rapid transit system proposed for the city of Kolkata in India.  The Government of West Bengal and SREI Infrastructure Finance signed a memorandum of understanding (MoU) to set up the light rail transit (LRT) system.  A special purpose vehicle, Kolkata Mass Rapid Transit Pvt Ltd has been formed to execute this Rs.6000 crore project.

Mezzanine: A mezzanine (or in French, an entresol) is, strictly speaking, an intermediate floor in a building which is partly open to the double-height ceilinged floor below, or which does not extend over the whole floorspace of the building.  However, the term is often used loosely for the floor above the ground floor, especially where a very high original ground floor has been split horizontally into two floors.

Supporting paragraphs: Facilities on the Mass Rapid Transit (Singapore) Mezzanine
Answer: entresol