add dynamic version to build via meson

remove unused arg in misc
mark arg as unused in addtax
update translations

src/misc.c

@@ -3,13 +3,13 @@
 #include <ctype.h>
 #include <stdlib.h>
 
-bool is_float(const char *s, float dest) {
-	if (s == NULL) {
+bool is_float(const char *string) {
+	if (string == NULL) {
 		return false;
 	}
 	char *endptr;
-	dest = (float) strtod(s, &endptr);
-	if (s == endptr) {
+	strtod(string, &endptr);
+	if (string == endptr) {
 		return false;
 	}
 	while (isspace((unsigned char ) *endptr)) {