The Pyramid of Languages

10 languages C, rk, ><>, Rail, Width, Gol><>, Fission, Cardinal, brainfuck, Befunge-98, 991 bytes

//Q rk:start print: "C^nrk" rk:end @,k*97C'a"rk"a"><>"a-1"Sail"a"Width"a"Gol><>"a"Fission"a"Cardinal"a"brainfuck"a"Befunge-98"
main(){puts("C");}
/*
$'main'
 \-[C\n\rk\n\><>\n\Rail]o

++++[++++>---<]>.>++++++++++.[------->+++<]>.-------.>++++++++++.[->++++++<]>++.--.++.>++++++++++.>-[--->+<]>---.[------>+<]>--.++++++++.+++.>++++++++++.[------>+<]>.+++[->++++<]>+.-----.--[--->+<]>--.------------.>++++++++++.[->+++++++<]>+.[--->+<]>++.---.--[->+++<]>.--.++.>++++++++++.[->+++++++<]>.[-->+++<]>.++++++++++..----------.++++++.-.>++++++++++.+[->++++++<]>+.-[-->+++<]>--.--[--->+<]>---.--------------.+++++.+++++.-------------.+++++++++++.>++++++++++.+[--->++++<]>--.[--->+<]>----.+++[->+++<]>++.++++++++.+++++.--------.-[--->+<]>--.+[->+++<]>+.++++++++.
R"C"N"rk"N"><>"N'S_!"ail"N"Width"N"Gol><>"N"Fission"*
/"><>krC"oaoooaooooE ao'liaR>'~ooooaoS"Width"aoS"Gol><>"; QQaAWAmcOAWAaicmaiWAAiwAOaOwWAAAOawmmFOcQww
 %"C"++++++++++,"rk","><>",=--t++,"ail"~,"Width","Gol><>","Fission","Cardinal"
 */

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568 bytes of this is just the brainfuck code. The Befunge-98 program produces:

C
rk
><>
Rail
Width
Gol><>
Fission
Cardinal
brainfuck
Befunge-98

7 languages (J, es, zsh, Bash, Straw, Retina, Fission), 222 bytes

echo 'J'
#0 : 0
echo es #(10)#»:::J>>(es)>>(zsh)>>(Bash)>>(Straw)>>
(echo zsh;)
if [[ $BASH_VERSION ]]; then echo Bash; fi
#              ;R"J"N"es"N"zsh"N"Bash"N"Straw"N'Q+!"etina"N"Fission"N;
K`J¶es¶zsh¶Bash¶Straw¶Retina

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