This is my essay of re-write a code for the CSA keyboard layout. According to the wiki image and my best guess, these two are a little closer now.
You can insert /usr/share/X11/xkb/symbols/ca
But I won't edit the image of keyboard, I don't know how.
partial
xkb_symbols "csa" {
name[Group1] = "Canadian Standard";
key.type[group1]="EIGHT_LEVEL_SEMIALPHABETIC";
key <TLDE> { [ slash, backslash, bar, NoSymbol,
NoSymbol, hyphen ] };
key <AE01> { [ 1, exclam, plusminus, NoSymbol,
onesuperior, exclamdown ] };
key <AE02> { [ 2, at, at, NoSymbol,
twosuperior, NoSymbol ] };
key <AE03> { [ 3, numbersign, sterling, NoSymbol,
threesuperior, sterling ] };
key <AE04> { [ 4, dollar, currency, NoSymbol,
onequarter, Eurosign ] };
key <AE05> { [ 5, percent, currency, NoSymbol,
onehalf, threeeighths ] };
key <AE06> { [ 6, question, notsign, NoSymbol,
threequarters, fiveeighths ] };
key <AE07> { [ 7, ampersand, braceleft, NoSymbol,
NoSymbol, seveneighths ] };
key <AE08> { [ 8, asterisk, braceright, NoSymbol,
NoSymbol, trademark ] };
key <AE09> { [ 9, parenleft, bracketleft, NoSymbol,
NoSymbol, plusminus ] };
key <AE10> { [ 0, parenright, bracketright, NoSymbol ] };
key <AE11> { [ minus, underscore, onehalf, NoSymbol,
NoSymbol, questiondown] };
key <AE12> { [ equal, plus, notsign, NoSymbol,
dead_cedilla, dead_ogonek ] };
key.type[group1]="EIGHT_LEVEL_SEMIALPHABETIC";
key <AD01> { [ q, Q, NoSymbol, NoSymbol,
NoSymbol, Greek_OMEGA ] };
key <AD02> { [ w, W, NoSymbol, NoSymbol,
lstroke, Lstroke ] };
key <AD03> { [ e, E, Eurosign, NoSymbol,
oe, OE ] };
key <AD04> { [ r, R, NoSymbol, NoSymbol,
paragraph, registered ] };
key <AD05> { [ t, T, NoSymbol, NoSymbol,
tslash, Tslash ] };
key <AD06> { [ y, Y, NoSymbol, NoSymbol,
leftarrow, yen ] };
key <AD07> { [ u, U, NoSymbol, NoSymbol,
downarrow, uparrow ] };
key <AD08> { [ i, I, NoSymbol, NoSymbol,
rightarrow, idotless ] };
key <AD09> { [ o, O, section, NoSymbol,
oslash, Ooblique ] };
key <AD10> { [ p, P, paragraph, NoSymbol,
thorn, THORN ] };
key.type[group1]="EIGHT_LEVEL";
key <AD11> { [dead_circumflex, dead_diaeresis, dead_grave, NoSymbol,
NoSymbol, dead_abovering ] };
key.type[group1]="EIGHT_LEVEL_SEMIALPHABETIC";
key <AD12> { [ ccedilla, Ccedilla, asciitilde, NoSymbol,
dead_tilde, dead_macron ] };
key <AC01> { [ a, A, NoSymbol, NoSymbol,
ae, AE ] };
key <AC02> { [ s, S, NoSymbol, NoSymbol,
ssharp, section ] };
key <AC03> { [ d, D, NoSymbol, NoSymbol,
eth, ETH ] };
key <AC04> { [ f, F, NoSymbol, NoSymbol,
NoSymbol, ordfeminine ] };
key <AC05> { [ g, G, NoSymbol, NoSymbol,
eng, ENG ] };
key <AC06> { [ h, H, NoSymbol, NoSymbol,
hstroke, Hstroke ] };
key <AC07> { [ j, J, NoSymbol, NoSymbol,
U0133, U0132 ] };
key <AC08> { [ k, K, NoSymbol, NoSymbol,
kra, NoSymbol ] };
key <AC09> { [ l, L, NoSymbol, NoSymbol,
U0140, U013F ] };
key.type[group1]="EIGHT_LEVEL";
key <AC10> { [ semicolon, colon, degree, NoSymbol,
dead_acute, dead_doubleacute ] };
key.type[group1]="EIGHT_LEVEL_SEMIALPHABETIC";
key <AC11> { [ egrave, Egrave, braceleft, NoSymbol,
NoSymbol, dead_caron ] };
key <BKSL> { [ agrave, Agrave, braceright, NoSymbol,
NoSymbol, dead_breve ] };
key <LSGT> { [ ugrave, Ugrave, degree, NoSymbol,
NoSymbol, brokenbar ] };
key.type[group1]="FOUR_LEVEL_SEMIALPHABETIC";
key <AB01> { [ z, Z, guillemotleft, NoSymbol ] };
key <AB02> { [ x, X, guillemotright, NoSymbol ] };
key.type[group1]="EIGHT_LEVEL_SEMIALPHABETIC";
key <AB03> { [ c, C, NoSymbol, NoSymbol,
cent, copyright ] };
key <AB04> { [ v, V, NoSymbol, NoSymbol,
leftdoublequotemark, leftsinglequotemark ] };
key <AB05> { [ b, B, NoSymbol, NoSymbol,
rightdoublequotemark, rightsinglequotemark ] };
key <AB06> { [ n, N, NoSymbol, NoSymbol,
U0149, U266A ] };
key <AB07> { [ m, M, mu, NoSymbol,
mu, masculine ] };
key <AB08> { [ comma, apostrophe, less, NoSymbol,
Greek_horizbar, multiply ] };
key <AB09> { [ period, quotedbl, greater, NoSymbol,
periodcentered, division ] };
key <AB10> { [ eacute, Eacute, dead_acute, NoSymbol,
NoSymbol, dead_abovedot ] };
include "nbsp(level3s)"
modifier_map Control{ Control_L };
include "level3(ralt_switch)"
include "level5(rctrl_switch)"
};
This is a comfirmation and not an answer:
Selecting French Canadian multilingual keyboard layout on Kubuntu
Canadian multilingual Keyboard selection in Unity desktop 20.04
Comparison to the CSA keyboard design,
Most of 3rd Level characters (Key with AltGr) are correct.
And some of 4th Level characters are not correct, on 6, a, -, é and so on.
