multi replacements

def replace_text(text, replacements):
    for old, new in replacements:
        text = text.replace(old, new)
        # text will be reassigned inside the function
        # the text outside is not modified (call by reference)
    # after all replacements, the changed text is returned by this function
    return text

replacements = [
    ("Зсбн","3 fM"), ("2сбн", "2 fM"),
    ("3сбн", "3 fM"), ("4сбн", "4 fM"),
    ("6сбн", "6 fM"), ("круг", "Runde"),
    ("ряда", "mal"),
    ]

text = "Зсбн‚ прибавка, 3сбн‚ (3с6н‚ прибавка)-3раза‚ 3сбн,Зсбн, прибавка-2раза=36сбн"
print(text)